Will this boost my wireless signal?

i have a bt home hub which is downstairs and my pc is upstairs so it receives a very week wireless signal which is poor for gaming. I was wondering that if i bought this would i boost my wireless connection? - a href="http://accessories.euro.dell.com/sna/productdetail.aspx?c=uk&l=en&s=bsd&cs=ukbsdt1&sku=A4895629&~ck=baynoteSearch&baynote_bnrank=0&baynote_irrank=0&dgc=SS&cid=41148&lid=1069637&acd=23975883724507267" rel="nofollow"http://accessories.euro.dell.com/sna/pro…/a